Tips, techniques for nonperpendicular holemaking - spotting drill vs center drill

 2024-07-10 00:47:19

And carbide – usually tungsten carbide – is a similarly tough material, and is commonly used in the manufacture of masonry drill bits.

At its New Product Rollout, Ingersoll showcased a number of options for high-feed machining, demonstrating the strategy’s growing footprint in the industry.

From quadruped robot dogs, to an in-booth putting green where you can test out a new golf putter, to a 3D-printed car and more, attendees enjoyed cutting-edge technology and innovations all week long. Take a look to see what (or who!) you might have missed this week!

Formnext Chicago is an industrial additive manufacturing expo taking place April 8-10, 2025 at McCormick Place in Chicago, Illinois. Formnext Chicago is the second in a series of Formnext events in the U.S. being produced by Mesago Messe Frankfurt, AMT – The Association For Manufacturing Technology, and Gardner Business Media (our publisher).

Lee Wimmer invited us to tour his second-generation family-owned machine shop in Perkasie, PA. This video explores the production processes behind precision-machined parts for both Wimmer Custom Cycle and LS Wimmer Machine Co., and shows how ingenuity and determination are still at the heart of American manufacturing. Today, both companies are now managed by Wimmer’s three sons.

Various design features of a precision toolholder allow it to realize tight concentricity, Mr. Burley says. Those features include:

If you’re drilling a hole for a screw in wood, you will need a drill bit that’s slightly smaller than the screw you’re planning to use so that the screw’s thread will tap into the material. If you’re drilling a hole more than 10mm in diameter, you may be better off with a completely different, more specialist type of drill bit, like a Forstner bit, a spade drill bit, or, for much better holes, a hole saw.

Incremental mode can be more advantageous when programming sculptured surfaces or for certain hole-machining canned cycle applications.

Heidenhain and Acu-Rite Solutions are offering several hands-on experiences at their booth this year, as well as internal components that reduce energy use.

Take a look inside James Engineering, a high-end CNC Deburring OEM that became a job shop when they decided to produce their own parts in-house.

For a start, drill bits are made from a number of different materials. And then the shape of the cutting face can be radically different depending on the material it’s designed to drill through. When you factor in price, the range of sizes available within a set, and the brand, the choice can be bewildering.

Determining the potential cost or value of runout may involve just a straightforward calculation. The 3-mm carbide drill used for the test in Figure 1 cost $40. The tightest runout permitted 148 holes, while the largest runout permitted just 1/3 this number. Therefore, the cost per hole dropped from 80 cents to 27 cents. Tighter runout thus saves the shop about $50 for every 100 holes.

Horn USA’s new booth concept is designed to enable attendees to (literally) get a better feel for its various tooling offerings.

When it comes to utilizing the spindle’s power, there is a lot of headroom at the upper limits, provided it’s in short bursts. Be mindful of your time at these loads so you don’t stall out.

Ever wonder what sets Top Shops apart from the competition? Dive into their award-winning practices and explore behind-the-scenes strategies for operational excellence.

AccuRounds has created synergy between culture and technology, driving a commitment to customer satisfaction and continuous improvement.

Manufacturers continue to feel the pressure to reduce costs, increase efficiencies and meet their sustainability strategies. As the industry evolves to keep pace with these priorities, there are opportunities within metalworking processes to use less resources with advanced lubricants and technical expertise. Agenda: An overview of metalworking lubrication Evolutions in metalworking lubrication Experience on the shop floor Key takeaways

Rob Guiao, Chris Hall and Bassanio Peters will demonstrate relatable situations to equip you with data to improve predictability, future-proof operations and maximize ROI. Agenda: Explore the importance of data in decision-making, especially for facility upgrades or new projects Learn how comprehensive solutions for manufacturing and construction projects can improve predictability and ROI See real demonstrations of machine integrations, facility layouts and automations to ensure proper throughput and integration

Job shops are implementing automation and digitalization into workflows to eliminate set up time and increase repeatability in production.

When Puneet and Neelam Neotia moved from India to the United States several years ago, they brought with them a family background in manufacturing and CNC machining. Now the couple is working to get their startup machine shop off the ground, sourcing new customers and getting the word out about their shop in Clarksville, Indiana. The couple — proud to publicize their "Made in the USA" parts — is leveraging family connections and manufacturing capabilities back in India, but not in the way that some people assume.

A seemingly small amount of runout can still be too large for the tool. Reduce this runout, and tool life or productivity may dramatically increase.

Did you know that the show was postponed for WWII? Or that McCormick Place was expanded in the ’70s just to accommodate IMTS? A fascinating look at the show’s history from 1927 to today.

Standards for surface finishes and profiles are not static; they change as technology changes or new processes come along that need to be considered.

Ever wonder what sets Top Shops apart from the competition? Dive into their award-winning practices and explore behind-the-scenes strategies for operational excellence.

Walter USA has acquired PDQ Workholding, intending to strengthen its offering of workholding products and develop future cutting tool sales.

Looking to automate your shop floor? The Automated Shop Conference (TASC) will connect shops with experts who can advise them through this transition.

You’ve usually only got one chance when drilling into glass or tiles – with the time cost and monetary expense of replacing breakages, precision matters. Many glass and tile drill bits just look like regular twist drill bits, but this trio from Wickes are spade, or spear, shaped. While spear-tipped bits are generally more prone to breakage than twist bits, that can often be preferable to breaking a tile.

Join Mahr for an informative webinar to discover the latest advancements in precision measurement, designed to elevate your quality assurance processes and unlock peak productivity. It'll explore cutting-edge technologies — such as modern height gages and contour measuring systems — along with their applications, benefits and technical capabilities. Discover the power of height gages: Learn how intuitive and sophisticated height gages can revolutionize your measurement processes, enabling quick and accurate results in inspection and production areas. Explore the practical functions and ease of use that make height gages an ideal solution for manufacturers seeking high-performance and reliable measuring technology. Examine sample applications and industries where height gages excel, such as qualifying first parts, inspecting incoming parts and measuring series of parts in industries like aerospace, automotive and medical. Unlock efficient contour measurement: An introduction to the latest contour measuring technologies that enable fast, simple and comprehensive contour measurement in the production environment. Discover how these innovative solutions ensure reliable measurements, saving time and increasing efficiency while measuring a wide range of workpieces. Learn how to streamline your contour measuring process with speed and simplicity, achieving fast and precise measurements with incredible versatility. Register now and discover how to unlock peak productivity with new innovations in precision measurement. Agenda: Insights into the latest precision measurement technologies and their applications Understanding of how to improve quality assurance processes and increase productivity Knowledge of how to select the right measurement solutions for your specific needs Tips on how to optimize your measurement processes for maximum efficiency

FANUC’s IMTS 2024 booth includes real-time demonstrations that show the abilities of its equipment, including robots, controllers and machine tools.

FABTECH 2024 will be held October 15-17, 2024, in Orlando, Florida, at the Orange County Convention Center. FABTECH provides a convenient ‘one-stop shop’ venue where you can meet with world-class suppliers, discover innovative solutions, and find the tools to improve productivity and increase profits. There is no better opportunity to network, share knowledge and explore the latest technology, all here in one place. Future U.S. Show Dates and Locations 2025 – September 8-11 at McCormick Place in Chicago, IL 2026 – October 21-23 at Las Vegas Convention Center in Las Vegas, NV 2027 – September 13-16 at McCormick Place in Chicago, IL

The bits are stored in a fairly tough plastic case, which can also function as a stand to make selecting the correct bit easier. Each bit is clearly labelled in the case too. The round shanks are suitable for use in the majority of drills with a three-jaw chuck.

CoroMill MS 20 is designed for repeated shoulder milling, face milling, linear and helical ramping, full slotting and plunging applications.

A set of donated boring bars that can be used in a 1954 boring head will enable volunteer machinists to recreate a pair of binoculars for the USS Pampanito.

Fig. 3—A toolholder with a smaller collet angle can clamp the tool more precisely. Typical collet angle is 16 degrees. The angle of the taper of this collet is 8 degrees.

It’s easy to spend plenty of time researching for your next drill, but it’s just as important to find the very best drill bits for your project. That’s because when it comes to drill bits, all things are most certainly not equal.

Ceratizit USA has promoted Troy Wilt from national sales manager to managing director of Ceratizit USA, cutting tools division.

The latest episode “Made in the USA” podcast explores a company that uses collaborative robots, one of the key tools helping US machine shops and other manufacturers compete with lower cost countries by automating production.

The findings illustrate various important points, Mr. Burley says. One is that the right runout is relative not just to tool size, but also to tool material. While the life of each tool improved as runout got tighter, the carbide drill suffered the most when runout was high.

In the latest episode of our View From My Shop series, MMS Editor-in-Chief Brent Donaldson visited the JN Shapiro Watches headquarters and production facility where Founder Joshua Shapiro—a history teacher turned watchmaker—realized his dream of "making a watch from scratch and everything in it."

When revising part designs, investigate the 3D CAD, the 2D drawing and the part’s functional requirements to determine which details should be tightened up.

Automation is no longer a luxury in manufacturing today – it’s a necessity. The Automated Shop Conference (TASC) will connect job shops with experts who offer advice and considerations for this process.

Fig. 2—Slowly rotating a precision-machined bar can measure a spindle’s static runout. The non-contact measurement device below can evaluate runout at the spindle’s operational speed.

New U.S.-based event announced in 2021 finally debuts next year: focuses on complete additive manufacturing value chain. More at formnextchicago.com.

Grant funding for workforce training or the purchase of new equipment is an undervalued but complex resource for machine shops. We enlisted an expert to help navigate the process.

Weldon Solutions is demonstrating three grinders at IMTS 2024. Though they differ in size and use case, all feature the company’s hallmark customizations.

Many shops think about the answer to that question in terms of a single number. When precision toolholder supplier Big Kaiser (Elk Grove Village, Illinois) informally surveyed metalworking facilities to ask what they considered acceptable runout, the consensus seemed to be about 0.0005 inch.

The Automated Shop Conference (TASC) will give shops of all sizes and production volumes key insights and practical guidance on how to implement automation.

Legacy Precision Molds takes us on a tour of their moldbuilding facility. They've recently implemented two automated 5-axis cells for metal and graphite machining that run lights out during nights and weekends.

Even with HSS, the savings are significant. The shorter HSS tool cost $15. Improving runout reduced the cost per hole from 23 cents to 10 cents. However, comparing HSS and carbide tells a story that may be more dramatic. Holding runout to 0.0004 inch or better let the carbide tool deliver the same life as HSS—at 2.8 times the speed. In other words, controlling runout could make it possible to switch to a faster tool. The ROI would then be measured in cycle time instead of tool life. This is the kind of potential that may be going unrealized in a shop that hasn’t given thought to just how much runout is really right for the process.

Features that save on training, programming and cycle times have enabled Speedway Motors to rapidly grow and mature its manufacturing arm.

The carbon steel shaft and tungsten carbide tip offers the sharpness and abrasion to cut through tougher materials. According to reviewers, the ease with which these Wickes items cut is impressive, especially given the price of these specialist bits.

Heidenhain and Acu-Rite Solutions are offering several hands-on experiences at their booth this year, as well as internal components that reduce energy use.

Dillon Manufacturing’s extra-long hard jaws feature extended reach, making them well suited for machining small diameters.

Toughness is paramount when drilling into metal because the heat generated can easily spell the end for cheap drill bits. Not so here, as this set from Draper sees the HSS straight shank bits coated with long-testing and tough titanium nitride. They’re likely to last longer, and they will not get lost as they come in a soft-grip plastic case which is clearly labelled, making finding bits and returning them to their correct slot a simple task. It’s also finished in Draper’s trademark blue, making it easier to spot at the bottom of a tool bag.

Concentric clamping of the tool allows cutting forces and wear on the tool to be more evenly distributed. The smaller the tool, the tighter this concentricity needs to be.

Modern Machine Shop is the leading publication and media brand in North America devoted to CNC machining. MMS combines unprecedented editorial access to manufacturing facilities with decades of experience to provide long-form content that is both insightful and impactful. About Us

We’re looking at the more commonly-used drill bits here and, to make the choice easier, we’ve broken them down into the type of materials they’re designed to drill through. Plus we’ve thrown in our top drill bit set that covers all the main options. We’ve looked at online reviews and ratings from a range of retailers to deliver our verdict.

Generally speaking, DIYers will end up buying a drill bit set, rather than a single bit – although there are exceptions, particularly for specialty jobs such as when a masonry drill bit is required – so that will already have a few of the main sizes covered.

Key specs – Number of bits: 50; Material: titanium nitride-coated, carbide-tipped; Sizes: 1.5-6.5mm (metal), 4-10mm (masonry), 4-10mm (wood); Case type: plastic carry case

When you think of a drill bit, most likely, a standard twist bit will spring to mind. These are suited to drilling metal or plastic. They have a sharp tip and the twisted grooves along the length to allow material to be drawn out of the hole to help keep the bit straight.

Understanding all the things that contribute to a machine’s full potential accuracy will inform what to prioritize when fine-tuning the machine.

Q-Mark has built its metrology business by providing what customers need, when they want it. This goes for its IMTS booth, too, with free drinks alongside custom technology.

Across a range of technical presentations aimed at small and mid-sized job shops, the first-ever Automated Shop Conference (TASC) offered insights into several automated technologies, implementation strategies, shopfloor training tips, and even the untapped power of automated coolant delivery.

Jack Burley is Big Kaiser’s vice president of sales and engineering. He says that consensus is correct—sometimes. If the tool is 3/4 inch in diameter or bigger, then 0.0005 inch may be good runout indeed. But applying this standard to all of the tools in the shop can be a costly mistake, he says. For tools that are very small, reducing runout to 0.0001 inch or less can yield considerable gains in tool life and productivity.

The odd breakage aside, the Bosch 50-piece X-Line set could be the only box of drill bits you will ever need. It covers the majority of common sizes you would need for drilling wood, metal, and masonry, plus it includes screwdriver bits (and an extension bar), a countersink bit, three sockets, two spade bits, and a gauge to check the size of the bits. It even comes with a snap-off knife.

Zoller’s open house in Ann Arbor, Michigan, provided attendees with a glimpse of the connectivity and efficiency the company’s products offer to users.

In this episode of Made in the USA, several executives and senior staff at Hardinge give their first-person account of how they formulated the plan to shift the manufacturing of its milling and turning product lines from its Taiwan plant to its plant in Elmira, New York, the major challenges they encountered and the rewards that made it worth the effort.

AccuRounds has created synergy between culture and technology, driving a commitment to customer satisfaction and continuous improvement.

Tool-holder-spindle-machine combinations each have a unique dynamic response in the same way that each person has a unique fingerprint, which can be revealed using modal testing.

This presentation focuses on the vital role that linear and angular encoders play in ensuring precision in machine tools. Attendees will learn about the common challenges compromising accuracy, such as thermal expansion, mechanical misalignments and vibration. Whether you're an OEM, integrator, or machine operator, this webinar will offer valuable insights into optimizing CNC performance. Agenda: Challenges to CNC machine accuracy Understanding encoder technology How encoders address accuracy challenges

Learn more about the variety of technology and machinery Hwacheon Machinery America, Inc. is featuring at its IMTS 2024 booth.

FANUC’s IMTS 2024 booth includes real-time demonstrations that show the abilities of its equipment, including robots, controllers and machine tools.

Chiron Group combines the best of both worlds at IMTS 2024, featuring live demonstrations of their Micro5 and Mill 2000 machines, alongside a cutting-edge virtual showroom. This innovative approach allows visitors to explore Chiron’s full product lineup without the logistical challenges of transporting large equipment.

Fig. 1—Here is a comparison of the effect of runout on tool life for three different 3-mm drills tested at four different runout values. The workpiece material was 1055 steel. The HSS tools were run at 90 sfm and the carbide tool was run at 250 sfm. Feed rate was 0.004 ipr.

In this webinar, industry-leading experts will demonstrate how additive manufacturing can revolutionize your operations and answer the question: Can you afford not to? From rapid prototyping to robust fixturing and specialized custom tooling, it’ll showcase the diverse applications that can drive your business forward in a time where cost and time saving can be crucial. Discover how to reduce costs, accelerate production cycles and achieve unparalleled design freedom through the strategic integration of 3D printing technology. Phillip’s panel of seasoned professionals will share real-world examples and practical insights to help you understand the potential of additive manufacturing. Learn how to overcome production challenges, improve product quality and gain a competitive advantage. It will explore the cost-benefit analysis of 3D printing — including material and labor savings — as well as the potential for increased revenue. Join this webinar to discover why additive manufacturing is no longer a luxury, but a necessity for success. Agenda: Prototyping example: quick-change prototype Custom tooling real-world example: press brake, tube bending die CMM fixturing and workholding example: CMM fixture and soft jaw

Consistency is key for beryllium manufacturing, so the data visibility granted by Harmoni has swiftly become a vital, profitable tool in the shop’s arsenal.

Working closely with customers and making careful investments has enabled this Wisconsin machine shop to tackle difficult jobs with tight deadlines as a core part of its business.

Wood drill bits are usually the easiest to spot in your set because they often have a very sharp pointed tip on the end – a brad point – which allows the bit to grip the wood, without moving around, to start the hole. They have a sharp double-bladed thread which allows the drill to work its way through the wood quickly.

Figure 1 shows the results of an experiment conducted by Big Kaiser’s parent manufacturer, Big Daishowa Seiki. In the experiment, three drills were tested at four different runout values. Cutting conditions were the same, and the tools were the same except for tool material and length. The three drills included a carbide tool penetrating to 3 times diameter, an HSS tool reaching the same depth and an HSS tool with through-tool coolant penetrating to 5 times diameter. Runout for all of the tools ranged from 0.0006 inch down to 80 microinches.

JD Machine, 2024’s Top Shops Honoree in Human Resources, embodies its “Education for Life” core value with a robust apprenticeship program and significant continuous improvement efforts.

Tool-holder-spindle-machine combinations each have a unique dynamic response in the same way that each person has a unique fingerprint, which can be revealed using modal testing.

Weldon Solutions is demonstrating three grinders at IMTS 2024. Though they differ in size and use case, all feature the company’s hallmark customizations.

To realize these savings, start with the spindle, Mr. Burley says. Most shops are familiar with the common gage used to test spindle runout error. The gage is essentially a bar machined to extremely tight tolerances. This is slowly rotated in the spindle to measure static runout. Less well known is the existence of dynamic runout. At the spindle’s operational speeds, runout can change as a result of heat, vibration and centrifugal force. Figure 2 shows both the common gage for static spindle runout evaluation and a gage that is capable of measuring a spindle’s dynamic runout. If evaluation of the spindle shows that it can maintain an acceptably small runout on its own, then the key to imparting that low runout to the tool is the toolholder.

Value is the name of the game with this set from Bosch, at just a touch over £1 per drill bit. If there’s a letdown, it’s that there’s no 9mm bit in the set, but all the other main sizes are covered so it barely harmed the near-perfect score among Amazon customers. Each bit has a sharp brad point for improved accuracy, and the shoulder-cutters on the leading edge of the grooves are designed to reduce tear out.

The MarSurf CD 140 AF is designed to measure many different kinds of workpieces, making it suitable for a wide range of measurement tasks.

Differential gaging measures using two devices, which has advantages over standard, comparative measurements using a single sensing head. These include the ability to measure size without regard to position.

Part of Major Tool’s 52,000 square-foot building expansion includes the installation of this new Waldrich Coburg Taurus 30 vertical machining center.

So far, Made in the USA has looked into system-wide effects of broken supply chains, automation, skilled workforce issues and our perception of manufacturing jobs — examining each topic through a prism of individual experiences. For this final episode for Season 1, let’s look at one more system-wide question and bring it back to personal perspectives: Is there today a new dawn, a new moment for American manufacturing?

Cobalt drill bits are much harder at higher temperatures making them good for drilling through stainless steel and other hard materials, though they are usually way in excess of what most DIYers need.

Ceratizit USA has promoted Troy Wilt from national sales manager to managing director of Ceratizit USA, cutting tools division.

The set is housed in a high-quality case which, despite being slightly tricky to prise some of the bits out of, is clearly labelled and sensibly laid out. The metal drill bits are HSS, the wood bits have sharp brad points, and the spade bits are titanium coated and have a square shaft to reduce slippage in the chuck.

Thousands of people visit our Supplier Guide every day to source equipment and materials. Get in front of them with a free company profile.

Working closely with customers and making careful investments has enabled this Wisconsin machine shop to tackle difficult jobs with tight deadlines as a core part of its business.

Most of the drill bits you’re likely to encounter will bear the abbreviation HSS, for high speed steel. It’s a steel, alloyed with a range of other metals, designed to withstand the extreme temperatures generated by drilling through harder materials at high speed, hence the name. But, despite the high breaking strength they exhibit, they’re also brittle and don’t offer much resistance to bending. Which means it’s easy to snap thinner bits with even the most innocuous of impacts.

The choice between buying a new machine or refurbishing the current one will become clear after a thorough assessment of the machine.

FANUC’s IMTS 2024 booth includes real-time demonstrations that show the abilities of its equipment, including robots, controllers and machine tools.

The findings also show just how much significance a “small” amount of runout can have on a 3-mm drill. Runout of 0.0006 inch is close to the figure that shops considered good runout in the informal survey. However, reducing the runout to well below this value improved the life of the carbide tool by almost 3 times. Even the least responsive tool saw tool life improvement of 60 percent.

But it’s definitely worth spending the time and doing your homework because there’s nothing more frustrating than not having the correct size or type of drill bit to hand when you need it, or to find the bits disintegrating right in the middle of a delicate job.

Smaller diameter drill bits tend to be easy to break, so it’s a helpful touch that Draper has doubled up on the 1.5, 2.0, and 2.5mm bits. And the inclusion of a 3.2mm bit, in addition to the 3.0 and 3.5mm bits, is helpful too.

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When it comes to utilizing the spindle’s power, there is a lot of headroom at the upper limits, provided it’s in short bursts. Be mindful of your time at these loads so you don’t stall out.

As the demand for faster production cycles continues to grow, the ability to produce high-quality parts quickly and efficiently has become increasingly important. High-speed 3D printing has emerged as a key solution to reduce lead times and increase productivity across industries. However, like any advanced technology, it comes with its own set of challenges. In this webinar, Forward AM will explore both the opportunities and hurdles of adopting high-speed printing with a particular focus on overcoming those challenges. It’ll start by discussing the fundamentals of high-speed 3D printing and how it differs from conventional 3D printing methods. It’ll then move on to the key factors that influence successful implementation, including the impact of materials, equipment and design considerations. One of the main hurdles in high-speed 3D printing is ensuring the right balance between speed and part quality. Different materials behave differently under high-speed conditions — and not all equipment is optimized for this process. Forward AM will showcase some validated materials and equipment that are proven to perform well under these conditions. In addition, the presenters will look at real-world examples and applications where high-speed 3D printing has been successfully implemented, highlighting the collaboration between designers, engineers and manufacturers. By the end of this webinar, you'll not only have a clearer understanding of high-speed 3D printing with FFF but also the practical steps and considerations needed to make the most of this cutting-edge technology. Agenda: Introduction The power of high-speed printing Know the process The practical side

Though most frequently used for diameter measurements, an air plug and platen can be readily configured to measure perpendicularity.

Pairing a shoulder mill with a five-axis machine has cut costs and cycle times for one of TTI Machine’s parts, enabling it to support a niche racing community.

Take a look inside James Engineering, a high-end CNC Deburring OEM that became a job shop when they decided to produce their own parts in-house.

A recent example involved a shop that held runout to 0.0002 inch for a precision drilling operation. This shop (like most other shops) considered 0.0002-inch runout to be small. However, switching to a toolholder designed for precision clamping allowed the shop to reduce this runout to 0.00009 inch, or 90 microinches. Forces and wear on the tiny drill became more evenly distributed. As a result, the shop was able to cut faster with this tool, realizing a cycle time savings of 20 percent. In addition, tool life increased by 3 times.

Entrepreneur Scott Colosimo found early success in China producing parts for his Cleveland-based motorcycle company in the mid-2000s. This is the story of how IP theft issues overwhelmed the business, prompting Colosimo and his team to start over from scratch — and move production back to the United States.

FANUC’s IMTS 2024 booth includes real-time demonstrations that show the abilities of its equipment, including robots, controllers and machine tools.

The Mill A Groove tool can be used to cut step grooves, convex and concave radius grooves, chamfered edges, angles and special profiles with a single insert.

Each tool setting technique has merit, and it depends on where you are as a shop and the type of work you do, as cost and efficiency all come into play.

The L.S. Starrett Co. has been manufacturing precision measurement tools in Athol, Massachusetts, since 1880. Attention to U.S. manufacturing often focuses on reshoring manufacturing from other countries, but Starrett never left. The facility in Athol employs hundreds and produces thousands of tools that remain vital for measurement in machining and other fields.

This effect does not just apply to drilling. When similar testing was performed on a small-diameter, four-flute carbide end mill, the difference between 80 microinches and 0.0006 inch of runout was a tool life improvement of more than 30 percent.

Pairing automation with air-driven motors that push cutting tool speeds up to 65,000 RPM with no duty cycle can dramatically improve throughput and improve finishing.

Tips, techniques for nonperpendicular holemaking - spotting drill vs center drill

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